According to this article, if you want to run Mac OSX at G4 Speeds (the company promises 80% of the speed of your PC) then you need Cherry OS, which can turn a PC into a Macintosh clone, and can allow you to MacOS and Macintosh applications directly on the PC. According to the company's website, the software can drag & drop files from PC to Mac, create multiple profiles, has full sound & networking support, and supports skins.